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Chemistry : Balancing Chemical Equations


What numbers are needed in the blanks to balance the following chemical equations?
Type these numbers separated by commas with no spaces in the answer.

Example :
Word Equation : Sulfur + Sulfuric acid → Sulfur dioxide + Water
Molecular Equation : _______ S + _______ H2SO4 → _______ SO2 + _______ H2O
Balanced Equation : S + 2 H2SO4 → 3 SO2 + 2 H2O
Answer : 1,2,3,2

Formats Info Page Quiz Review
Fill in the blanks

Your Performance  

1.

_______ KBr + _______ Cl2 _______ KCl + _______ Br2
 
Hint      

2.

_______ NaOH + _______ H2SO4 _______ Na2SO4 + _______ H2O
 
Hint      

3.

_______ Fe + _______ O2 _______ Fe2O3
 
Hint      

4.

_______ CuO + _______ Na _______ Cu + _______ Na2O
 
Hint      

5.

_______ Al + _______ Cl2 _______ AlCl3
 
Hint      

6.

_______ P2O5 + _______ H2O _______ H3PO4
 
Hint      

7.

_______ FeCl3 + _______ SO2 + _______ H2O _______ FeCl2 + _______ HCl + _______ H2SO4
 
Hint      

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